Crossing gate



Jan. 1, 1935. J. H. STALEY 1,985,958

CROSSING GATE 3 Sheets-Sheet 1 Original Filed Nov. 29, 1932 v Inventor,

J'ose vh Hsmzey; By K Attorneys.

Jan. 1, 1935. J. H. STALEY 1,935,958

CROSISINGI GATE Original Filed Nov. 29, 1932 s Sheets-Sheet 2 I nuentar,

E 5;; I f 3. Joseph HStaZe y,

i W 0 m V //A Attorneys I Jan. 1, 1935. J STALEY 7 1,985,?58

CROSSI-NG GATE Original Filed Nov. 29, 1952 3 Sheets-Sheet 3 Track Power Line Inventof,

Joseph H. Staley,

fzzw Attorneys.

vber 1541933, Serial No. i 14 Claims.

application is" a division from my application filed Nov. 29, 1932 in the United states v Patent Oflice, Serial No. 644,839; I v i This invention relates tothe art of traiiic c h u in d rzah a i p a t rin ah 1 .5

crossing gates and particularly to a type of gate which may swing downwardly 1 to a horizontal position to guard at crossing andwhichwill be then normally maintained across a lane of traific but which may be *yieldingly swung horizon- 1 tally to prevent breakage-of the-gate should a vehicle strike the lowered gate.

1, m t pe a eq e b e. di icu ty has been'had in providing an actuating mechanism rw hc ld be m un e w i th a es e dard and connected with the, gate itselfwithout a complicated mechanisrn being required. A "primary object o f my invention is to provide a structure easily manufactured andassembled and which will be reliableunder all operating conditions. V Another object of the invention is v to provide means preventingtheraising of the te l hesat i mso el u p s t o h thanacrcss the lane -,of traffic whereby the gate could not beraised' -to interferewith wires or other elements which may be, presentuat the side, and above the gate, L I

; A t o t e nv n p sr qap 'vide means for hol ding the lower ed gate in its [normal position across; the lane of traifieand 1 permit it to-be swungtherefrom only upon the application of a force exceeding that normally returningthe gate. a c I 7 These and other objects and advantages will becomeapparent, in "the following description of the, invention and referenceis made to the aceo in t r win i hic I Fig. 1 is arfragrnentary central vertical elevation th r cugh a, structure embodying my inventjon; H i

Fig, 2,,a horizontal transverse section on :the line 22 .m,.F e i Fig. 3,";a cen ralvertical; elevation at right angles tothat shownin'Fig; 1; c J ligs .a ira m nta t n m w Of t struct ire; I I

I Fig".-;5, a'fcentral vertical section lthrough the operatingcylinder; i" V i "1 Fig; '6, 1a .detail in vertical section of the head ilatchin g nieans p q 1 Fig. 7, aisidelevation oflthe motor witch on, a slightly enlarged scaleil 1 a 5 v Fig. 8, a side elevation of the con ro mechaism as viewed from theside opposite .to Eig. 1;

Fig' 9, aIwiring diagram, and I 55 i -.1 a, Si j v i n at afpairbr are j jA foreign matter. i

i .to rece 698,170 a H I a (01. 39- v V shown iin-La' lowredposition guarding a crossing. f

Likacharacters of reference indicate like parts throughoutthe several views v Igform a standard to ha ea -base 10, a main and ahead cap l4. Thelhousing [I1 is ahollow f body the principal portion ofwliiQh-is cylindr ia door 16 is pressed byriinser'ting its upper edge i under e ding-f an e 17;an s in i4' .13 o nd, a und,a aiast the; ask tan securing it in place by a. cap ,screwfllfi passed v through the door into the flange at the a lower side. This door 16 is provided with openings19 I and 20 7 toward the topand lbottoml ffispectively .over which hoods project and tbehind whichare imounted screens so that a circulationof air rnay 20 be had between the inside 'and foutside' offth e housing t: h i q z" 1 {Ihe headim o unti ng ing mas; alcylindrical esecti'onuhaving' the same outside diameterof that of the cylindrical portion of j the body for housing ll and is made 11113 separate piece" solely to facilitate machining of ;its upper; endso as -to receive thereon.afpluralityiof;balhbearings 21' spaced therearound inanannular groove. ,The

u t i 12 i red ei sl e al' by telescoping it over an upturned flange and passing cap screws through ears j turning fin' wardly respectively from the two members] The-ring .12fis-prov1d de-w hffll rm?? 5 to the center; 1 8

tending from: one sidejther'eofouter end of the arm being bored throughverti a a n cent l a m 1 3m &6 1i b Y;- T-- ceive a pin .23 therethrough.; Thisarm 22- is' provided J with "an opening nean the wall of the 49 ring 12 into-whichiisinserted a -pu lley wheel 2;

and a pin 253sv entered through a bore provided in th'e ringj12ffromthe outside'to .pass rev olubly thrQugh theE wheel 24 so as to, provide an axle therefor. on. which the wheelna'y turn. The 515 1 pin"'25 is securelyflheld-in piazza by means ota set screw passed through -the arm- 0 bear against 'the;' pi n,;frjoin the insiderof the ring 12. a i

the upper end of the mounting ring-.12 so as to Emmet-the;ballnbear n ne wi hine This head Original application Noveinber 29,1932, seri l f 11,644,839; Divided and this applicationjhlovein The head 13 is a'cylindrical lmember I oove center to screwthreadedly receive the upper end of the pin 23 axially of the head and a lock nut is provided on the upper end of the pin 23 to prevent accidental displacement of the pin from the head arm. The lower end of the pin 23 screwthreadedly passes through. the transverse bar of a downturn'edlyoke 28 so as to have the bar of the yoke inclose proximity to the under side of the arm 22 and a lock nut 29 is provided on the end of the pin 23 which projects. below the yoke bar so that the bar 28 serves as'a stop to prevent the pin 23 from being withdrawn -up wardly through the arm 22., Thus the head 13 is retained in place on the mounting ring 12 to permit the head to revolve around over the-rin 12 but preventing its being tipped over orbein'g lifted upwardly therefrom. 5 A

On the top side of the arm 22 is mounted a pulleywheel 30 to re'volveabouta vertically dispo'sed 'axis and-a cable-31 having its upperend secured to the arm 2' 7,here shown 'as on the side of a web-reenforcing'the arm, is carried around under the arm '27, around the pulley 30 and 'over around the pulley 24 to be carried downwardlyj-through the ring 12 and into the housing ll-to have its lower end pulled downwardly by spring tension, the cable being "here shown as'attached to anequalizing bar 32 wnichis engagedwit-h the upp n of p n 33',-he re shownfas two number, the lower ends of-Whio'h springs are'a-ttached to a bar 34 which is in turn securedto a side of the housing 11. {By "means 'of' the'se springs 33, the cable 31 is 'pu'lled--tending 'to revolve the head 13 around horizontally over the mounting ring 12. A stop post 35, Fig.6, is secured to'the arm 2? to extend downwardly therefrom'to be in the path of the arm-22 whereby the'postf35 will strike the arm 22 andprevent further rotation of the head 13 "in that direction. Adjacent the place of contact of the post 35 with the arm 22 is mounted a bracket 36 which has alatch member '37 pivotally secured thereto and urged upwardly bya spring 38, the tension of whichis adjustedby 'meanspf a screw 39 hearing 'upwardly;thereagainst. -fThe' 1.-1rrderside of the post 35 is cut to have a face sloping downwardly and outwardly in relation to the'under side of the arm 22 and the latch member 3' 7 is: formed to have a notch removed therefrom with a postengaging face such that when the post 35 approaches the arm 22 the diagonally positioned" under face of the post 35 will strike. 'an "OPTJGI'SIODiIIg edge of the latch 37 tending to depress it so as to allow the post tot-rav'el thereoverfan'd have asloping face of the notch in the latch member come up behind the post 35 tending to urge the post 35 toward the arm 22 by 'reasonof the spring 38 carrying the latch member upwardly. This slop;- ing face in the notch is so disposed that while it normally retain the post 35 against the arm '22. the post"-35"may be pushedback thereagainst withfsumcientpressure to carry the latch downwardly and permit the post to escape from engagement with the latch. a c A shaft -40 ismqunted'acrossthehea d 13fin a horizontal positionfhereshown as on aflchordal line rather *than on a diameter, and hasits ends rockably carried'ith'roug'h journal boxes to extend outside of the head on each side. Gate arms-41 are fixed to the respective projecting ends of this shafti5 iri'such amfanner that as the-shaft may-"be rocked, the arms may-becomevided witha plurality of annular grooves.

.Referring .again to the yoke 23, a cylinder 45,

shown in more detail in Fig. 5, is mounted on a base46 which is rockably engaged by cap screws sfi-extendingthrough the lower ends of the arms of theyoke 28 vso as to rockably carry the cylinfder therebetween. 'tThis cylinder is provided with apiston' ia whichjis without packing but is pro- A .piston. rod 49 is connected with the piston 48 and extends upwardly through the cylinder head "50 through a packing glandfiiand is directly connected by a "yoke 5'2 on its upper end with the lever 53 wvhich is secured to the shaft 40.

The yoke 52 is screwthreadedly engaged on the upper end'of the frod49 'so that the piston 48 may be adjusted som-ewhatin respect to its distance from the end of the lever '53. The head '56 is prov-ided'w-i'th'a discharge opening and a discharge hose 54 is connected to the head to be -in'commu-nication with this opening. The cylinder base i6 is provided with an opening 55 from a *centralpassage '56 which extends transversely across the casting. In one endof this casting i'er'base {1 6 is a valve 57adapted 'to intercept the passage "5'6 which valve has a rod 58 connected thereto-normally carried upwardly by means of the spring '59. This rod 58 extends on up in a guided relation through the head" 50 and is turnedover thereabove and carried around the piston-rod Fl9-to ;f-onn=a ring through which the rodmay freely slide. collar 60 =is adjustabl-y emme onthe pi'ston rod '49 so as tobe carried against the rod 5B so as to push the rod downwardly and-overcome-the spring 59 to close'the valve 5'? upon sufficient downward travel of the piston 48 in its cylinder.

"Within theho'sin'g -11 isfplaced' a compara- "ti-vely' shallow pan 61 to contain a relatively small amount or oil;- The housing 11 is provided with'a floor preferably in the form of a grid with-depressions therein to receive and 10- cats the pan 61 so as to prevent it from being shifted about over "the floor. Over this pan 61 is placed a tray or-cover '62 which serves as a platform to ca-rry an'operating pump -63 and its driving motor 'fi iQfThis pump63 has an intake pipe 65"ext'ending down through the. cover '62 'ivell awn-d me "bottom of the pan 61 and is further preferably provided with an automatic relief having "a discharge pipe -66 returning through the cover to discharge into the pan 61.

The "pump 63 with its automatic relief is not shown here in detail since its structure "per se 'does not-enter into my invention and since it be obtained commercially. The pump 63 may. "discharges through a throttling valve 6'7which ,hasba bi-pass pipe 68 leading back through the -cover "62"to discharge into the pan 61. After the bi-pass valve 67,,fis provided a check valve 69 "m'ountedin suclr manner that flow. through it rnay -be had from the valve 67 but reverse flow from-"the check valve toward the bi-pass valve is prevented: The line from the'pump continues with a side outlet opening being provided intowhich is fitted a hose line -70 and after the side outlet is a solenoid operated zvalvei 71" nor;-

, mallygopen then va cut-off valve1'l2?also normally open and finally a fitting 7'13 normally. carryin'g the flow from the pump back; down through the cover 62 to dischargeiinto rthe pan 61. The' overflow hose "54 -.isjherel'shown as being connected to thefitting- 73 toallow: the hose to' 'dischar'ge through the fitting into the pan61.

The-hose is'carried upwardly to be'engag edwithafitting 74 which discharges in one direction through a pipe 75- and-around into th'atend of the passage 56in the base 4'6: which may be intercepted bythe valve 57. 'Theifltting '74discharges in another 'direction'througha check valve-76 and thenceinto the other'end of the passage 56. ed between the fitting 74' and thebase46 so as to permit flow in that direction but preventing flow in the opposite direction. ;A connection is provided between the lower 'end of oneof the armsof thefyoke 28 an'd the valve 72 whereby horizontal rotation of the head 13 will operate the'valve '72 such that with the gate in its normal position, the valve remains open, while in the horizontally rotated positionthe valve will be closed. This connection is here shown 'as comprising a" two-part, telescoping, square sectioned tube 77 the upper end of whichis pinned loosely to an extension of-the arm'from the yoke 28 while th'elower end is pinned to the valve plug,

rocking connections being provided between-the tube and the plug and between the tube and the yoke arm but so formed asto have the tube revolve fwitl kthe arm. 4 By reason of this telescoping "connection, it is not essential thatthe within a box 84 carried by standards' on the cover '62 of the pan 61 within the "housing 11. This relay switch 83 is normally open and is e'm ,ployed to close the circuit: of power linef whe'ni the axle or WheelSof-afcar or train operating uponfthe track completes the circuit through thebattery tl; Whnthe' relay switch'coil 8 2 is thus energizedthe switch 83, hei'e-indicated as a double-pole switch is olosed andjacircuit is provided therefrom t' 'nclu de' the motor'.64, the winding of the solenoid valve '71; a warning bell 86,1here shown as z-heing mounted onathe head 14, Fig 1;and a plurality of awarninglights 1 85 here-shownyli'ig. lofa'sbeing arranged behind glasses "or lenses to display the word Stop. The winding of the solenoid valve 71 "thus being energized} the valve :is' closed and the pump 63 then being operated bythe"motor+ 64 for cespilup through the hose 70-to within the cylinder 45, the valve 57 being closed so that the oilmay flow through the opening 55from that end ofthe' passageway 56 to'whi'ch is connected the'oheck valve '76. Itis to be understood" of courseithat the g'ate is' normally returned to itsupper or open position by means of thecounter-weight 44' so that the piston .48

is initially at the lower end of the cylinder 45. As the pump continues to discharge: loil,: the

The check valve '76 ismount-v this over travel.

to. force the rod 49" upwardly, and thereby rock piston: 48qwil1 .-beraisedi in. thelcylinder 45 so as,

the shaft 40 around to .7 lower the a gate. Th

piston 48 i continues traveling; upwardly .gunder. the pressureexerted by the, incoming =;.'oiluntil a switch is operated to stopv the; motor. 1"

The switch is:preferably.in the form: 0 cury tube switch, which ijmay 1 be rocked to, close and open the motor circuit-- without havingfiany exposed are; or spark, s, Referring to F 'igsn 13', ,4

and 7, the mercury tube,87' is here shown as fbflr ing carried within ahousing..88, which is rock:

ablymounted on the side of .a-bracket-89. The

housing 88 is pivoted-aboutva pin 90'which isgso located in respectflto thevhousing thatthe hOUSI- ing will-qnormally tend to drop downwardlyflby its outer'endso-as to rock :;the;tube;8 7:therewithin to a closedf position Thishdownward rocking of the housing is limitedby the rearend of the housing; striking a lip 91;t11rned; outwardly from the bracket-151 A second pin 92,iscarried by the housingtoi be aboveand to the, manger the shaft 40 to be swung-"around againstthepin 92 so as to have rocked thehousing 88 around tottilt the tube 87} to the fopen position by the time the shaft 40 has carriedlthe gate-down to its: horizontally disposed position. b The; upward rocking ofthe'housing88 is limited by the-upper c corner ofit striking the lip- 91 as indicated-in Fig. 7:; p The bracket 89 ishereshown -as being mounted over the edge-of an oil .wellthrough which the shaft 40 extends,='t0,h v. the housing 88 immediately above the shaft 40;,3 The arm :93. a is 'pivotally attached to a-clamp 94 which adjustably attached tO thegshaft. 40 iii-the 1 same i V manner as a C'clamp. VThe arma93is'attached tothe bracket 94 bymeans; of ;a pin 95 :rockably supporting the arm and the, arm is slriapedat its lower endrbelow the pivot pin 95 toighaveyone corner irounded offs-to; permit -the"' arn 1 being turned about thepin 95 awayfrom the housing pin 92 but having'gthe'opposite corner left in-,7

tact to forma foot-which will strike the clamp l 94 soas to;preventrotation ofn-the arrn 93in the opposite direction." A spring 96 between the a rmi 93' and theclamp'94 is employed to rockih a fm 93 around tozits limit of ;travel: as determined by the contact of ithis vcorner with theclamp ZIhis-mouritingflof the am 931 is employed as a means for preventing gbreakageor damage; of any sort'and'to permitrapproximate rather than ex-'- 1 'actadjustm'ents of the bracket 89 and the clamp 94"in respect"flto-each other so that after-:the

housingx88 has been rocked to its, upper position the shaft ':40 may ,continue revolving slightly since the a'rni 93 maywbe rocked backwardly .to over come :the pull' 'of the pressure is: inthe cylinder s under "the gpiston"if 48 tending tozhold the gate in that position; the

spring 96 in the eventEof motor has. been disconnected fromfthe energizingj' circuit; the; solenoid valve"'-'!1 remains close by .1

reason :ofits coil stilliremaining in thatc rcuit; andf-thelights 85 andthe 'bell 84v remain energized" to give the v'isibleand audible warne ingsn Niowshouldv sufficient oil leak past th ton-48 to abovethe piston, the'rleakage, if umcient; may overflow and return back through the hose 54- to-Hthejpanfil; Also ifythis leakage Y sufiiciently great, pressure, under the piston48 be'comesreduced so that the.weightsk44:may;tend

to lift or swing the gate, but immediately theup ward swing startsthe; armj 93is carried away prom tne pim' z toa permit the housing ae-wer'op and thereby again. close that part of the ener- "glaing-"clrcuit whichr includes the motor. 64': so

that the pump 63 is again-set in operation to replex'iishlth'e oil below the piston 48 and return it to its-upperpositioni 1 ;1 3'1 The; upward-travel-of the piston; ro'd 49- is-limited by means ofu an:adjustablev screw,- 97 which extends down through the head cap 14,120 be struck-by the lever 53-, Fig. 1. vent too greatan impact against this s'crew; .I employ theicusto'mary rods 98 hingedly connected to the outer ends-ofi-the gates which drop down and strike the roadway or ground: to arrest further downward travelof: the gates, Fig. 10. The length of the rod 98 and the adjustment of the screw: 9-7{ are correlated so that both operate to limit the' downward'swing of the gates.

The gate thus remains in thehorizont'al position guarding thecrosslng until? the 'track or block- "circuit is opened, whereupon the relay switch 83' is opened; the bell' 84 and lamps 85 deenerg-iz'edt the motor 64 stopped; and the coil in the solenoidvalver'll deenergized to permit the'valve to open' and thus allow oil to drain back from the cylinder 45 to' the then open valve 57 and down through the hose 70, through the open solenoidvalvd-the open'valve 72, and the fitting 73 into'thepan 61. This draining of the cylinder 45 is further accentuated by reason of the weights 44 tending to lift the gate and force the'piston 48 down through the cylinder toexpel the? oil. The action normally takes place when the-gate, is allowed to remain in its position to swing across the-"highway being guarded but should the gate have been struck or"-rc'ck'ed' around while in the horizontal position, even though the relaysw-itch' 83 has been opened, the oil cannot-escape from the cylinder 45since the valve 72 hasbeen closed by the horizont'al rotation'of the gate andthe return flow of the ,0il is cut off thereby. However asfsoon as the pressure againstthe gatehaving caused the horizontal rotation is removed, the springs 33 will pull the head 13 around to bring the gate ba-Cktoj its normal position which: position then has caused the valve 72 to be opened 'so as to allow the draingage'a of the oil and permit" the weights 44 to carry the gate to its openposition. Just before the weights i'strike the' baseIO, the collar '60 having been" properlyi adjusted along the rod 49' will strike the overturned end of the rod 58 so as'to close the valve B'I and shut-off further drainage of the oil from the cyl inder 45am thereby provide a cushion of. oil under the 'pist'on 48 to check thevsp'eed' 'of..the falling weights; 44 so toallow theiri to'icome into contact withithe base 10"with 'afmuch lessened impact.

The cable 31 may be hooked-upwith the-head 13 so as-toselectively form right" and left hand gates. The hook -up is here shownias for a-left hand gate'and to change it over to a righthand gateQthe stop post35'is mounted ontheother side of the arm 27 'so'as to'b'e i'n'the path of the arm 22 on that side and the latch bracket 36 is correspondingly shifted t'o th'e othere'dge of the arm 22 and the pulley'30 shifted to the other side of the pulley 24'. The cable 31' is then brought up around'the opposite s'ideof'the pulley 24, carried around the shifted pulley 30 and then attached to the arm 27; 7

The pump 63' has a much greater capacity than required to fill the cylinder 45 within the time desired; and the-throttle valve. 67 is em- Inorder to pre- I played to: control the rate of delivery of" the oil to the'cyli'nder'. vBy adjusting the valve to. alter -the;bl'eed'.therefrom through the line 68, the required;rate may be obtained. The pump, being provided: with a built in relief valve discharging through thereturn 66, can: not deliver pressure exceeding a predetermined amount, and hence it for anyreasoncthe motor remains energized no damage may be done to the system.

While I have here shown my invention in the onespecific form as new best known to me, it is obvious that structural changes. may be made without departing from the spirit of the inven tion-jand'I'=the17efore do notdeslre to be limited to that precise-form beyond the limitations asma be imposed by the: following claims. i Q

1. In a crossing gate, a housing, a head revo- -lubly; supportedjbyvthe. housing, a gate arm hinged tothe head to swing vertically, an arm operating. cylinder,- a cylinder supporting member carried by thehead, a: lever interconnected with said arm, a piston in the'cylinder, and a piston rod extending from the piston and connected with said lever; said cylinder being rockably carriedby-said member whereby the cylindermay rock in conformity with the varying angularity ofthe rodwith the'lever as the piston moves in thecylinderwhereby the'piston is held against rockingin the cylinder.

2.- In a crossinggatepa housing, a head revolublysupported by the housing, a gate arm hingedtoithe headto swing vertically, an arm operating cylinder,. a cylinder supporting member'carried bythe head, a lever interconnected withsaid arm, a pistonin the cylinder,v and a pistonrod: extending from the piston and connected with said lever, said cylinder being rockably carried bysaidmember whereby the cylinder; may rock in. conformity with the varying angularity of the rod with the, lever as the piston moves in the,cylinderwherebythe piston is held againstrockingin the-cylinder, anupper cylinder head enclosing the cylinder and guiding said rod; therethrough, means-Ior supplying apiston actuating medium to said vcylinder -and means for draining said medium from. the cylinder above said-piston. i a a 3, In a crossinggate, a housing; a head, revolubly supported bylthe housing, a gate arm hingedto the-head to swingvertica-lly, an arm operating cylinder, a cylinder supporting member carriedby the head a lever interconnected with saidgarm a piston inthe cylinder, and a pistorr rod extending from vthep iston and. connected with said lever; said-v cylinder being rock: ably carriedby said member, whereby the. cylinder may -roclrin conformity with the varying angularitypf the rodwith the lever as the piston line to prevent. return'flow from the cylinder, a

bi-pass linefromjthe cylinder to the-supply line aroundthe check valve, ashut-ofi valve in the bipass line I normally. open, and means actuated cylinder whereby the piston is held against rock- 7 by travel of the piston rodto close said valve ing in the cylinder, means including a pipeline near the end of travel of the piston to retard the drain of fluid from the cylinder as a cushioning means at the end of'travel of the gate.

5. In a crossing gate, a standard," a;.head

horizontally revoluble on the standard,a gate operating cylinder, a cylindercarrying member supported by and revoluble with the head, said cylinder being rockably supported by said carrying member about a transverse'axis, a transverse gate shaft rockably carried by said head,

' a lever fixed on the shaft, a piston in the cylinder, a piston rod extending from the piston and connected with said lever, an oil pan in the standard, a cover on the pan, a pump, motor and oil flow control valves carried by the cover, and a flexible hose line extending from the pump 1 and valve on the cover to said cylinder.

6. In a crossing gate, a standard, a head horizontally revoluble on the standard, a gate operating cylinder, a cylinder carrying member sup-' gate shaitrockably carried by said head, a lever fixed on the shaft, a piston in the cylinder, a piston rod extending from the piston and connected with said lever, an oil pan in the standard, a cover on the pan, a pump, motorand oil flow control valves carried by the cover, and a flexible hose line extending from the pump and valve on the cover to'said cylinder, one of said valves being adaptedto control the flow of oil from the cylinder to the pan, anda connection between said cylindercarrying member and said valve whereby said valve is operated upon turning of said head. v

7. In a crossing gate, a. standard, a head horizontally revoluble onthe standard, a gate operating cylinder, a cylinder carrying member supported by and revoluble with the head, said cylinder being rockably supported by said car- I standard, a revoluble head on the standard, a

rying member about a transverse axis, a transverse gate shaft rockably'carried by said head, a lever fixed on the shaft, a piston in the cyl inder, a piston rod extending from the piston and connected with said lever, an oil pan in the standard, a cover on the pan, a pump, motor and oil flow control valves carried by the cover, and a flexible hose line extending from the pump ber carried by the head, a lever interconnected with said arm, a piston in the cylinder, a piston rod extending from the piston and connected with said lever, said cylinder being rockably car-, ried by said member whereby the cylinder may rock in conformity with the varying angularity of the rod with the lever as the pistonmoves in the gate arm operating cylinder rockably said valve.

for supplying oil under pressure to said cylinder to move said piston, and means operated bytermined travel'of said head."

9. In a crossing gate, a revoluble head, a gate I arm, a shaft carrying the arm, an operating lever fixed to the shaft, a cylinder carried by the head and rockably mounted to swing at,

right angles to said shaft, a piston in the cylinder, and a piston rod interconnecting said piston and said lever. i

10. In a. crossing gate, an operating cylinder, a piston in the cylinder, said cylinder, being closed at both ends, means for supplyinga fluid under pressure to one end of the cylinder, and

means, draining from the other end of the cylinder that fluid which may leak past said piston,

said piston normally permitting a'slight leak age of fluid therepast, and switch means operable upon travel of the gate setting in motion and stopping said supply means in accordance with the leakage-past thepiston. v

11. In a crossing gate, an operating cylinder, a piston in the cylinder, said cylinder being closed at both ends, means for supplying afluid under pressure to onev end of the cylinder, and

means draining from the other endof the cylton, .said piston normally permitting a slight leakage of fluid -therepast, and switch 'means I operable upon travel of the gate setting'in'mo tion and stopping said supply'meansin accordance with the leakage past the piston, means draining from the cylinder that fluid supplied inder to cushion the stopping of the piston.

12."In a crossing gate, in combination, a

gate arm rockably carried by the head, and a carried by said head. I

. a inder that fluid which may leak past said pis-1 13, In a'crossing gate, a standard, a gate arm carried by the standard, a cylinder, a pisto'ng in the cylinder for actuating the arm, an oil containing pan in the standard under the-cylinder, an oil retaining cover .over the pan, oil delivering means comprising a motor driven pump mounted on the cover, flexible pipe means; a

between the pump and one end of the cylinder,; and a flexibledrain pipe between the pan and the other end of the cylinder for draining oil therefrom which may leak past the piston.

14. In a crossing gate, a standard, a head revolubly mounted on the standard, a gate arm rockably mounted on the head, an arm actuating cylinder, a fluid line connecting with the cylinder, a valvein the line,-and connecting means between the head and the valve whereby rotation of the head causes corresponding ro-. tation of the valve selectively to close and open JOSEPH'II-I. sTALEYm 

